Water-tube boiler.



E. H. WELLS.

WATER TUBE BOILER. I APPLICATION msnmms. 1913.

Patented A11 24, 1915.

2 SHEETS-SHEET 1.

lwmron ATTORNEYI.

E. H. WELLS.- WATER TU'BE BOILER.

APPLICATION FILED AUG-6.1913.

I Patented Aug. 24,1915;

2 SHEETS-SHEET 2 llllllllllllllll INVENTOR I flw 6/ rm/MEN,

UNTTED STATES PATENT OFFICE.

, EDW'ARD H. WELLS, 0F MONTCLAIR, NEW JERSEY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, CORPORATION OF NEVT JERSEY.

WATER-TUBE BOILER.

Specification of Letters Patent.

Patented Aug, 2d, 1915.

To all whom it may concern Be it known that I, EDWARD H, WELLS, a

citizen of the United States, residing at.

Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in VVater-Tubo Boilers, of which the following is a full, clear, and exact description, reference being had to the. accompanying drawings, forming part of this specification, in which- Figure 1 is a sectional side elevation of one embodiment of my invention, and Fig. 2 a sectional end elevation thereof. 1

Similar reference numerals indicate simi-' lar parts in the several views.

Referring to the drawings the numeral 1 designates the front and rear walls, and 2 the side walls of the setting. ,A boiler for the. utilization of waste heat is shown, the gases entering through the flue 3, but it is applicable to any class of service. The boiler consists of a longitudinal steam and water drum 4i supported by the front and rear walls, or by other convenient means, centrally of the setting, and a parallel mud drum also located centrally of thesetting, Expanded into these drums aretubes divided into as manybanks as may be desired for a particular installation, three banks, designated 6, 7 and 8, respectively, being shown, each bank consisting of five rows of tubes. The mud drum 5 is supported above the floor of the setting so that the soot and dust which falls from the tubes, or from the hot gases, is deposited in the space at the bottom and. at the sides of the drum, from. whence it can be readily removed through the doors 16. The front end of drum is protected by the inner wall of flue 3. i

The rows of tubes of banks 6, 7 and 8 may be set so thatthere shall be a space between each two rows, as in a Stirling boiler, to provide for the renewal of the inner tubeswithout cutting out some of the others. By bending the upper and lower ends of the tubes so that they enter the drums 4 and 5 radially it is possible for the rows of tubes to be extended from one sidewall to the other, resulting thereby in a substantial gain in the heating surface.

Between the first and second banksof tubes is a vertical ballle 9 extending from the foundation upwardly around the mud drum, andv supported by two rows of tubes 10. Between the second and third banks is a vertical baiile 11 extending from the drum 4: downwardly, and supported by two rows of tubes 12. The baffies 9 and 11 extend from one side wall of. the setting tothe other, and are at right angles to the drums 4 and 5. In order to secure an efficient heat absorption of the gases in passing over the tubes, the gases are deflected into the banks of tubes and across, the tubes by horizontal bailies 13, supported upon suitable xackets, and extending between the banks of tubes and the tubes 11 and 12 which support the vertical baffles. Inclined shelves 14 may be introduced at the front and rear banks, as shown.

The boiler may be used with or without a superheater. One position that the superheater may occupy is at the rear of the. first bank of tubes. The superheater shown. consists of a series of U-shapcd tubes 15 lying in substantially vertical planes and with their lower ends connected to cross boxes or headers 17 and 17 located immediately above the mud drum. A pipe 18 leads from the steam space of drum 4 to box 17. suitable steam outlet leads from box 17. In this position, the hot gases after passing across the lower portion of the tubes of the first bank will strike the supcrheater, after which the gases will be deflected, by the baffle-13 immediately above the loops 15, forward into the upper portion of the first bank of tubes. lVith the superheater in the position shown the maximum obtainable superheat may be secured with a given amount of superhcating surface, and the superheater tubes at the same time will be protected from over-heating, as the hot gases will first pass through the first bank of boiler tubes before striking the superheater; Further, the superheater is in a position where the lower part of the boxes are readily accessible, and the arrangement is such that the ends of the supcrheater tubes where they enter the boxes may be readily inspectedf The construction of the boiler does not limit the position of the superheater to that shown in the drawings, for

example, the superheater may be placed in the second pass of the boiler, either in front or at the rear of the second bank of tubes, and may be so located if only a limited amount of. superheat is desired.

Other advantages incident to the con struction and arrangement of the parts above described are. that every part of the boiler heating surface can be readily inspected; all parts of the tube surface can be readily dusted by means of an air or steam lance; all soot and dust can be readily removed from the space below and at the sides of the mud drum: the vertical battles 9 and 11 are held securely in position by the boiler tubes on each side of the same; and a considerable gain in the heating surface is secured by having a single steam and water drum and a single mud drum placed centrally of the setting so that the rows .of

tubes may extend from one side wall to the other.

In the operation of the boiler shown in the drawings. the gases enter the boiler at the front and first flow over the lower part of the first bank of tubes and the superheater loops. then over the upper part of the first bank of tubes. across and downwardlyover the second bank of tubes, then across and upwardly over the rear bank of tubes to the stack outlet 15.

lVith the three banks of tubes shown in the drawings the flue gases l -ve the'boiler near the upper part of the setting when they enter at the bottom of the lirst bank of tllbt and leave the boiler near the lower part oi the setting when they enter at the top of the first bank ol tubes.

The spacing apart of the banks of tubes, as shown in the drawings. enables a man to enter between the banks for purposes oi. cleaning the tube surfaces. or removing or replacing tubes.

\Vhat l claim and desire to secure by Letters latent ol" the lnited States is: i

l. boiler having a single longitudinal steam andwater drum and a single longitaidinal mud drum. water tubes arranged in separated banks in planes at right angles to the. longitudinal axes of the drums and cou net-ting said drums. said banks being separated sullieiently to allow entrance between them. vertical ballles between the banks and water tubes sep.-irated from the banks and supporting said ballles. said supporting tubes being expanded into the drums.

boiler having asingle longitudinal steam and mater drum and a single longi tudinal mud drum. water tubes arranged in separated banks in planes at right angles to the longitudinal axes of the drums and coir net-ting said drums. said banks being separated sullieiently to allow entrance, between them, vertical ballles b tween the banks. thev first of said battles at the rear of the first 6!! the longitudinal axes of the drums and eon- 76 necting said drums. said banks being separated sutliciently to allow entrance between them. vertical battles between the banks and water tubes separated from the banks and supporting said battles. said supporting 80 tubes being expanded into the drums, and shelves projecting from the vertical bafiles toward the separated banks of water tubes.

4. A boiler having a single longitudinal steam and water drum and a single longitu- 86 dinal mud drum. water tubes arranged in separated banks in planes atright angles to the longitudinal axes of the drums and conneeting said drums. said banks being sepa rated sulhcientlv to allow entrance between 90 them. an inlet for the gases near the lower part ot the first bank. vertical battles between the banks at right angles to the longitudinal axes of the drums to give the gases up and down passes to the outlet flue. and 9 water tubesseparated from the banks and supporting said battles.

, 5. A boiler having asingle longitudinal steam'and water drum and a single longitudinal mud drum. water tubes arranged in separated banks in planes at right angles to the longitudinal axes of the drums and connecting said drums. said banks being separated sullieiently to allow entrance between 'them. vertical battles between and parallel with the banks. water tubes supporting said batlles. and a superheater in the pass be tween the first bank and the first of Said batlles.

6. boiler having a single longitudinal steam and water drum and a single longitudinal mud drum. water tubes arranged in separated banks in planes at right angles to the longitudinal axes of the drums and connor-ting said drums. said'b'anks being separated sullieiently to allow entrance between them. vertical ballles between and parallel with the banks. water tubes separated from the banks and supporting said batlles. and a super-heater in the pass between the first bank and the lirst of said batlles.

7. boiler having a single longitudinal steam and water drum and a single longitudinal mud drmn. water tubes arranged in separated banks in planes at right anglesto 12.:-

the longitudinal aXes ol the drums and conni-r-ting said drums. said banks being scp- .arated Hllllhltfltl) to allow entrance betweer them, vertical bafiies between and parallel In testimhny whereof I have hereunto with the banks Water tubes separated from signed my name in the presence of two subthe banks and supporting said baffles, and a scribing witnesses.

superheater in the pass between the first EDWARD H. WELLS. 5 bank and the first of said bafiies, said super- Witnesses:

heater forming the major portion of the D. C. JAooBUs,

heating surface in said pass. EDITH CAMP- 

